Xx. ABSTRACT OF PROCEEDINGS. 
9. **‘The Distribution of Frictional Losses in Internal Com- 
bustion Engines,” by E. P. TayLor, B.E. (Communi- 
cated by Professor S. H. BARRACLOUGH). 
EXHIBITS. 
Mr. C. A. SUSSMILCH exhibited some remarkable examples 
of miniature rock folding from near Seaham. 
Mr. H. CHEEL exhibited specimens and submitted notes 
on the following species of Acacia :— 
Acacia intertexta, Sieb. in DC. Prodr. ii, p. 454 (1825): 
A. obtusifolia, A. Cunn., in Baron Field’s N.S. Wales, p. 
345 (1825). This species is included by Bentham under A. 
longifolia, Willd., c. typica. It may be distinguished from 
the latter species by the following characters :—A. inter- 
texta flowers during the months of December and January, 
but rarely matures its pods and seeds. A few pods were 
obtained from plants at Mount York near Mount Victoria 
in December, 1900, and from plants collected on the Woro- 
nora River in October, 1901, and also from plants at Hill 
Top in November, 1914. Although the pods are only found 
on an occasional plant, the individual plants are very 
numerous on the Blue Mountains, and also in the neigh- 
bourhood of Hill Top, on the southern line. The ripe pods 
are more fleshy or pulpy than those of A. longifolia, Willd., 
the latter being much thinner in texture and are produced 
in abundance. 
Although the plants of A. intertexta very rarely produce 
mature pods and seeds, it is found upon examination that 
the plants spread very rapidly by means of suckers. So far 
as I can ascertain, very few records have been made of 
Acacias reproducing themselves by means of suckers. 
R. T. Lowe in “A Manual Flora of Madeira etc.,’’ p. 231 
(1848) mentions that Acacia dealbata, Link. is cultivated 
in gardens in Madeira, and that ‘“‘the roots run near the 
surface, throwing up suckers.’’ Inthe Proc. Linn. N.S.W., 
